Term
Which imaging modality places dots of dissimilar grayscale on the display?
A. A-mode
B. B-mode
C. I-mode
D. M-mode |
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Definition
| B. B-mode, or brightness mode, displays reflected echoes as spots of varying brightness. The depth of the dot is based on the time of flight. Stronger reflections create brighter dots. Weaker reflections create darker dots. |
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Term
Which imaging modality places time-of-flight information on the x-axis and echo amplitude on the y-axis?
A. M-mode
B. L-mode
C. J-mode
D. A-mode |
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Definition
| D. A-mode, or amplitude mode, diplays reflector depth on the x-axis. Reflector depth is determined by a pluse's "time of flight". The strength of the reflection is desplayed on the y-axis. |
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Term
Which imaging mode accurately displays reflector depth?
A. I-mode
B. B-mode
C. C-mode
D. A-mode |
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Definition
| D. A-mode, or amplitude mode, displays the reflector depth accurately. A-mode is used in opthalmology, where precise measures of depth or thickness are required. |
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Term
Which imaging technique usually displays a single jagged line of varying heights?
A. A-mode
B. B-mode
C. C-mode
D. I mode |
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Definition
| A. A-mode, or amplitude mode, displays reflected echoes as spikes of varying height. Echo amplitude appears on the y-axis, and reflector depth on the x-axis. The spike's location the x-axis is based on the pulse's time of flight. The height of the peak is determined by the reflection's strength. Stronger reflections create higher spikes. |
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Term
With B-mode, on which axis of a CRT is the strength of the reflection input?
A. x-axis
B. y-axis
C. z-axis |
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Definition
| C. With B-mode, reflection strength is input into the z-axis |
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Term
The mode that produces lines related to the changing position of reflectors in the body with respect to time is called ___.
A. A-mode
B. B-mode
C. M-mode
D. a la mode |
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Definition
| C. The imaging mode that diplays the position of reflectors throughout time is M-mode or motion mode. M-mode is the only display that provides reflector position throughout time. |
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Term
To which of the following do the x-axis of a B-mode, the y-axis of an M-mode and the x-axis of an A-mode all relate?
A. depth of view
B. echo amplitude
C. go time
D. time of flight |
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Definition
| D. All three of these measurements report the reflector depth. Reflector depth is determined by a pulse's time of flight. |
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